Update link to QuPath extension (#1155)

Author: diazandr3s

plugins/qupath/README.md

@@ -17,7 +17,7 @@ Download QuPath from: https://qupath.github.io/ and then install monailabel plug
 
 ## From Binaries
 
-Download [qupath-extension-monailabel-0.3.0.jar](https://github.com/Project-MONAI/MONAILabel/releases/download/data/qupath-extension-monailabel-0.3.0.jar)
+Download [qupath-extension-monailabel-0.3.1.jar](https://github.com/Project-MONAI/MONAILabel/releases/download/data/qupath-extension-monailabel-0.3.1.jar)
 and **drag the jar** on top of the running QuPath application window (black screen area) to install the extension.
 If you are have previously installed then make sure to **_remove/uninstall_** the extension before updating.